2019
DOI: 10.1002/ajb2.1369
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Abstract: Premise Hybridization is a key process in plant speciation. Despite its importance, there is no detailed study of hybridization rates in fern populations. A proper estimate of hybridization rates is needed to understand factors regulating hybridization. Methods We studied hybridization in the European Dryopteris carthusiana group, represented by one diploid and two tetraploid species and their hybrids. We sampled ~100 individuals per population in 40 mixed populations of the D. carthusiana group across Europe.… Show more

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Cited by 11 publications
(7 citation statements)
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References 91 publications
(139 reference statements)
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“…Such analyses have largely focused on lineages occurring in temperate zones such as Europe, North America, and Japan, whereas fewer efforts have been made to study species‐rich areas in the tropics. In addition, many hybrid taxa were introduced based solely on morphological comparisons and few of these were later subjected to more extensive analyses (e.g., Sigel, 2016; Hornych et al, 2019; Schnittler et al, 2019). Similarly, spores were checked for viability in only a subset of described nothospecies.…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…Such analyses have largely focused on lineages occurring in temperate zones such as Europe, North America, and Japan, whereas fewer efforts have been made to study species‐rich areas in the tropics. In addition, many hybrid taxa were introduced based solely on morphological comparisons and few of these were later subjected to more extensive analyses (e.g., Sigel, 2016; Hornych et al, 2019; Schnittler et al, 2019). Similarly, spores were checked for viability in only a subset of described nothospecies.…”
Section: Methodsmentioning
confidence: 99%
“…Nothotaxa have been often ignored even though they provide crucial information about the processes involved in the assembly of biodiversity in many plant groups. Nothospecies—meaning the mainly sterile offspring of hybridization events—enable the recognition of reticulate evolution (Wagner, 1983), including the later formation of species originating from these progenitor nothospecies (Hunt et al, 2011; Sigel, 2016; Hornych et al, 2019; Schnittler et al, 2019) and could allow gene flow to be traced between closely related species by way of hybrid bridges. As a consequence of their transitional state, nothospecies are differentiated from sexual and apomictic species by the highly diminished or total inability to form regular spores, which may be assessed by the spore abortion index (Hornych & Ekrt, 2017).…”
Section: Introductionmentioning
confidence: 99%
“…Concerning to the identification of parental species, it is known that chloroplast and mitochondrial DNAs are maternally inherited in ferns (i.e., from the egg-cell), whereas the paternal inheritance (the atherozoid) contributes only to nuclear DNA (Gastony & Yatskievych 1992, Kuo et al 2018. And so, in hybridization events, the hybrids would have the same chloroplast and mitochondrial DNAs as their maternal progenitors (Vogel et al 1998, Xiang et al 2000, Testo et al 2015, Hornych et al 2019. On the other hand, the identification of paternal lineages requires more complex analyses, such as combining sequences of nuclear markers with sequences of low-copy markers (e.g., Pereira et al 2019).…”
Section: Introductionmentioning
confidence: 99%
“…The rate of hybridization (Koutecký et al, 2011; Ma et al, 2014; Zanella et al, 2016) and its limiting barriers (Rieseberg and Carney, 1998; Baack et al, 2015) have been studied extensively in angiosperms. Even though ferns are considered to hybridize frequently (e.g., Testo et al, 2015), hybridization rates in fern populations have rarely been assessed quantitatively (Hornych et al, 2019). Hybridization barriers and promoters have likewise received relatively little attention (Xiang et al, 2000; Testo et al, 2015; Hornych et al, 2019).…”
mentioning
confidence: 99%
“…Even though ferns are considered to hybridize frequently (e.g., Testo et al, 2015), hybridization rates in fern populations have rarely been assessed quantitatively (Hornych et al, 2019). Hybridization barriers and promoters have likewise received relatively little attention (Xiang et al, 2000; Testo et al, 2015; Hornych et al, 2019). Nevertheless, it is well established (Regalado Gabancho et al, 2010; Dyer et al, 2012; Ekrt and Koutecký, 2016) that apomixis and hybridization can meet in ferns (Manton, 1950)—when an apomictic species hybridizes with a sexually reproducing species, an apo‐sex (apomictic) hybrid is formed, which we refer to as an apo‐sex hybrid in this study.…”
mentioning
confidence: 99%